SECTION I · THE BRIEF
Brief #97126Updated 21 AUG 2026LONDONYcY COMBINATOR
Employbl Company Profile

Backend Engineer

QFEX is the 24/7 exchange for traditional financial markets. We let you trade US equities, commodities and FX pairs with (or without) leverages of up to 50x. On QFEX, UX comes first: brokerless market access, seamless…

Location
London
Company size
2–10
Posted
4d ago
Via
Yc
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Backend Engineer · QFEX

View company profile
Job title
Backend Engineer
Job location
London, England, GB
Job listing URL
https://www.ycombinator.com/companies/qfex/jobs/2j9OMID-backend-engineer
Job description
# Backend Engineer --- ## How Markets Should Be Traditional financial markets are broken. We are fixing them. QFEX is the first perpetual futures exchange to allow 24/7, high leverage on traditional financial assets.  Our vision: this kind of exchange will replace the entire $100bn TradFi exchange, clearing and brokerage industry Our mission: make QFEX that exchange. We were founded by Cambridge Maths duo Annanay Kapila and Joshua Wharton, who previously worked at Tower Research Capital and Citadel, respectively. The team also includes former staff from Jump, Barclays, and more. QFEX raised $9.5m from a group of investors including General Catalyst, Y Combinator, Nexus Venture Partners and Paul Graham. ## What You’ll Do **Reliability & performance** \ Design fault-tolerant, low-latency, always-available services; write load tests and chaos suites; tune until p99 is boring. **Testing**\ Set up and carry out automated test suites including CI/CD and minimize technical debt. **Technical direction**\ Evaluate tools, set coding standards, and guide architectural decisions as we scale. **Culture & hiring**\ Share and receive new knowledge and experiences, set impeccable cultural standards, and help interview the next engineers. ## What You’ll Need * A **STEM degree** from a University that is highly ranked in your home country (at the level of Oxbridge/ Imperial in the UK, HYMPS in the US, or a top IIT in India). * Experience with a **high-performance language** like **Rust**, **C or C++**. * **3+ years** building and working on real-time production **Exchanges** or **HFT Systems**. * The desire to create and impose a responsible culture of **tests, metrics, and graceful degradation**. * Impeccable **levels of trust in yourself and others**, including the ability to make **decisions in minutes**, not days. ### Bonus points * Fintech, exchange, or low-latency experience. * Experience with a **Python** and common data science libraries like pandas and numpy. * Deep Kubernetes or infrastructure-as-code experience. ## Benefits * Lunch allowance and regular company events. * The ability to grow alongside some of the best minds in fintech, as well as set standards and culture. * 25 days holiday + bank holidays.
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Where this role is based

London

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QFEX headquarters

New York City, NY

Company size

2–10 employees

Founded

2025

Total raised

$10,000,000

View company profile ↗

Funding rounds

  • Seed$9.5M
  • Pre Seed$500K